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| Series | Geological Map of Japan 1:200,000 |
| No. | NK-54-19･20 (NK-54-20) |
| Map Name | IWANAI (2nd ed.) |
| Author | Masao ISHIDA, Koji MIMURA and Toshio HIROSHIMA |
| Publish Year | 1991 / 1968 (1st ed.) |
| Publisher | Geological Survey of Japan |
| Price | ¥2,530 ( Purchase Guide ) |
| Prefecture | HOKKAIDO |
| Size | 785mm×545mm |
| Download | Geological Map (Raster, GeoTIFF, KML) To this page |